The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1998
Filed:
Sep. 26, 1996
Robert J Lieb, Joppatowne, MD (US);
Richard B Murray, Churchville, MD (US);
Robert L Pastel, Alamosa, CO (US);
Rosario C Sausa, Bel Air, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A hand-held probe monitors the presence of trace hazardous materials including nitrocompounds and halogen-containing compounds. The hand-held probe provides real-time and in-situ site characterization and analysis. The probe operates in accordance with a laser photofragmentation/fragment detection technique which employs one or more lasers for photolysis of the analyte molecules and/or facilitating the detection of the characteristic fragments by multiphoton ionization. The probe includes a tunable laser, a pair of miniature electrodes coupled with a fiberoptic cable and lens assembly mounted in a sweep wand, and a data and analysis system. An adjustable laser beam stopper allows for atmospheric sampling or surface analysis at the point of interest. Applications include the detection of nitrocompounds by probing the characteristic NO photofragment and halogenated compounds by probing the respective characteristic halogen atom photofragment. The monitoring of other hazardous materials and pollutants is possible.